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WILLIAM S. WOOD, OF NEWTOVVN, NEW-YORK.

IMPROVNENT IN POLlSHlNG-MACHINES.

Specification forming part of Letters Patent No. 157.261, dated November 24, 1874; application tiled August 29, 1874.

To all whom it 'may concern Be it known that I, WVM. S. VOoD, of Newtown, in the county of Queens and State of New York, have invented a new and Improved Rubbing-Machine, of which the following is a specification My invention relates to a machine designed for rubbing down rough surfaces, so as to make them smooth or polished by means of a compound circular and lateral motion, (closely imitating that of the hand in the so-called French polishing process,) imparted to the substance employed in cutting or rubbing the surface acted upon, such as marble, wood, metal, painted or enameled surfaces, Svc., said motion being effected by a rotary spindle with a chuck-plate, to which is attached a spring- Ypivot carrying a box or holder for the grinding substance in such a manner that the pressure and stroke or mot-ion are entirely at the command of the operator.

The object of my invention is 'to produce a smooth or polished surface with great speed and accuracy, and with less manual labor than is now employed.

Figure l is a side elevation of amachine embodying ply invention. Fig. 2 is a front elevation of the same. Fig. 3 is the chuckplate and spring-pivot. Fig. 4 shows a bottom view of the holder and a section of the frame of the machine where the steering-rod passes through it.

Similar letters of reference indicate corresponding parts.

A is an upright frame, which should be substantially made to resist the vibrations of the operating parts. a a are the journals. B is a rotary spindle with driving-pulley, driven by the belt b, from which motion is communicated to the operating parts. O is a chuckplate on the spindle B, to which is attached a spring-pivot, e, carrying the holder f, by means ofa pin sliding in the circular groove of springpivot c. j" is the steer-rod attached to the holder f, passing through a slotted space in the upright frame A, as shown in section :v y, Fig. 4, thus giving to the holder j' the lateral while the revolving chuck-plate O gives to itthe circular motion. D is a'lever with an adjustable counter-weight, d, at one end, the other end carrying a jointed socket, c, from which the spindle B is suspended, although allowed to revolve freely. E is a treadle, connected with the lever D, as shown in Fig. l, by means of which the holder f is brought down to touch the surface operated upon, the spring-pivot e allowing it to yield slightly upward to pressure to adapt it to any little variations of the surface. H is an adjustable table, upon which the work is placed, held to the upright frame A by means of bolts or other contrivance, as represented in Fig. 2.

I make no claim to the mode in which the spindle B is suspended, elevated, or depressed, as I am aware that it is not new; but

What I claim as new, and desire to secure by Letters Patent, is-- The combination, in a rubbing and polishing machine, of the pivoted holder f, slotted revolving disk or plate O, and steering-rod j", as shown and described, for the purpose specitied.

WILLIAM S. WOOD.

Witnesses T. B. MosHER, ALEX. F. ROBERTS. 

